Write numbers in the boxes to balance the equations below. 1. ___ H2 + ___ O2 → ___ H2O 2. ___ Cu + ___ O2...

Write numbers in the boxes to balance the equations below.
1. ___ H2 + ___ O2 → ___ H2O
2. ___ Cu + ___ O2 → ___ CuO
3. ___ Na3PO4 + ___ HCl → ___ NaCl + ___ H3PO4
4. ___ Fe + ___ Cl2 → ___ FeCl2
5. ___ AgI + ___ Na2S → ___ Ag2S + ___ NaI
6. ___ Al + ___ HCl → ___ AlCl3 + ___ H2
7. ___ SiO2 + ___ HF → ___ SiF4 + ___ H2O
8. ___ SnO2 + ___ H2 → ___ Sn + ___ H2O
9. ___ Al + ___ O2 → ___ Al2O3
10. ___ Fe + ___ O2 → ___ Fe2O3
11. ___ P4 + ___ O2 → ___ P2O5
12. ___ N2 + ___ H2 → ___ NH3
13. ___ CH4 + ___ H2O → ___ H2 + ___ CO
14. ___ C4H10 + ___ O2 → ___ C8H18 + ___ H2O
15. ___ Mg(OH)2 + ___ HCl → ___ MgCl2 + ___ H2O